Tension device for loom shuttles



Dec. 16,. 1924 1 1,519,942

W R. THIGPEN TENSION DEVICE FOR LOOM SHUTTLES Filed June 4, 1924 ATTORNEY Patented Dec. llfi, llQZ-d.

WELLIAE'I R. THIGPEN, 0F FAYETTEVILLE, NORTH CAROLINA, ASSIGNOR T0 DRAFER UGRPORATION, OF HOPEDALE, MASSACHUSETTS, A CORPQRATION 0F MAINE.

TENSIUN DEVICE FOR 1100M SHUQLTLES.

Application filed June 1924-. Serial No. 717,869.

To aZZ wizom it may concern:

Be it known that 1, WILLIAM R. THIGPEN,

a citizen of the llnited States, and a resident 0t Fayetteville, in the county of Cumberland and State of North Carolina, have invented an Improvement in Tension Devices for Loom Shuttles, of which the following description in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to loom shuttles and more particularly to loom shuttles of the automatic filling replenishing type in which the shuttle is provided with means for imparting suitable tension to the filling or yarn as it is drawn from the filling carrier or bobbin.

In weaving with certain characters or kinds of filling it is desirable that the filling be laid in theshed with relatively more tension than usual, and one of the objects of the present invention, therefore, is to provide a loom shuttle of the type indicated, with means for imparting the desired tension to the particular filling or thread in use.

in accordance with the present invention, the tension device is preferably formed of sheet metal having its main body portion secured in fixed position in the shuttle and extending in the bobbin chamber to inclose the end of the filling carrier or bobbin from which the yarn is drawn during weaving. The adjacent ends of the spring tension device are located rearwardly of the threading block and beneath such ends of the spring tension members a support is provided in the bobbin chamber for preventing downward displacement of the ends of the spring tension members either during use or dur ng filling replenishment, and since the character of the yarn or filling may be changed from time to time, provision is made for adjustment of the tension members. in order to apply varying degrees of frictional resistance to the movement of the filling between said members.

The novel characteristics and new features and combination of parts will best be .made clear from the following description and the accompanying drawings of one good form of a shuttle provided with the present invention.

in the drawings:

Fig. 1 is a perspective view of the threading end portion of a shuttle, showing Suficient thereof to make clear the association of the present. invention therewith;

Fig. 2 is a plan View of the construction shown by Fig. 1;

Fig. 3 is a section of the shuttle substantially on the line 3-3 of Fig. 2;

Fig. 4 is a perspective view of thethreading block removed from the shuttle, a portion of the block being cut away;

Fig. 5 is a plan view of a modification of the invention; and

Fig. 6 is a detail perspective view of one of the spring members of the modified form of tension device shown by Fig. 5.

In weaving with certain kinds or characters of filling it is desirable that the filling be laid in the shed under tension, the desired degree of which is not usually imparted by the ordinary filling replenishing shuttle. As the filling is withdrawn from the shuttle during its flight it will swirl or take a circular course about the end of the filling carrier or bobbin and be thrown from control of the tensioning means located as heretofore either on the threading block in the thread passage, or at a point forward thereof. One of the features of the present invention therefore consists of a tension device which extends inthe bobbin chamber of the shuttle closely adjacent to and inclosing the end of the filling carrier or bobbin,

the tensioning end portions of the tension more especially the filling engaging end portions thereof, shall be so supported that should the incoming filling carrier touch the tensioning device, it will not be deflected from its operative position, but, on the other hand, would rather deflect the filling carrier itself into its proper position in the shuttle, and another feature of the present invention therefore consists in formin the tensionin device of metal plates w ich have the body portion thereof secured to the loom shuttle and the ends brought together in the bobbin chamber to inclose the end of the filling carrier or bobbin and rest upon a shelf or support beneath.

The shuttle 1 is formed as usual with a bobbin chamber 2 having a bottom opening 3 through which the filling carrier in the shuttle may be ejected on replenishment of filling. In the bobbin chamber 2 of the shuttle the filling carrier or bobbin l on which the filling 5 is wound, is supported by any appropriate means now well understood in the art. I

Frontward of the end of the filling carrier or bobbin 4 the body of the shuttle is provided with a threading block receiving recess 6, Fig. 3, in which is secured the threading block 7, which may be of usual or any preferred construction adapted for the automatic threading of the shuttle when the latter is picked after the replenishing operation.

The threading block 7 is secured in its operative position in the chamber 6 by the securing bolt 8 which passes laterally through the walls of the shuttle and through a hole inthc block 7 and the latter may be provided with a downwardly extending lug 9 to assist in maintaining the threading block in its position, as usual.

As shown in Figs. 1, 2 and 3, the tensioning device comprises the metal springs 10 which may be secured in the bobbin chamber of the shuttle by pins or'studs 11. Each of the spring plates 10 extends forwardly in the bobbin chamber, as indicated in .Figs. 1 and 2. and at their front end portions, such spring plates converge towards each other, as indicated at 12, at which point they approach the end of the filling carrier or bobbin 4 and inclose the sameuwithin the bobbin chamber. At their forward extremities the spring plates 10 are brought together, as indicated at 13, to form a passageway for the filling as it unwinds from the filling carrier or bobbin and passesfrontward towards and through the thread passage of the threading block. In order that the ends of the plates 10 may act with the desired tension upon the yarn or filling and in accordance with the character or size thereof. the springs are under the control of regulating means for adjusting their frictional engagement with the filling passing between them. As indicated in Figs. 1 and 2, an adjusting screw 14 is passed through the side walls of the shuttle and the ends of the respective screws bear upon the spring plateslO preferably at a point where said plates curve and converge frontward to enclose the end of the filling carrier or bobbin, the construction being such that upon manipulation of the adjusting screws 14. the tensional energy of the spring members 10 upon the filling may be regulated as desired.

lVhen the full or Wound filling carrier is placed in the bobbin chamber on automatic replenishment of filling, and the shuttle is picked from the replenishing box, it is desirable that the filling be directed properly to the thread passage of the threading block and between the ends of the spring tensioning members. To this end each of the upper edge portions15 of the spring plates 10, where they converge, incline downwardly to a slight extent, shown in Fig. 3, so that when the fresh filling carrier has been placed within the shuttle and the shut-.

tle is picked, the swirling or circularly moving filling will be directed by the inclined upper edges 15 of the spring tensioning plates not only to the nip between the plates themselves but also into the thread passage of the threading block. By making the upperedges 15 of the spring tensioning plates slightly downwardly inclined, the incoming filling carrier on replenishment of filling will more efiectively move the yielding portions of the spring tensioning plates should the end of the filling carrier strike either.

Since the spring tensioning plates are located within the bobbin chamber and the ends thereof are disposed between the end of the filling carrier and the threading block, or rearward of the latter, it is desirable that the ends of the spring tensioning plates be sustained from displacement downwardly should a filling carrier strike either plate on filling replenishment. As shown in the present instance of the invention, therefore. the shuttle is provided with a shelf or support which extends underthe end portions of the spring tensioning members. In the present instance such shelf or support consists of a plate 16 which extends into the threading block receiving chamber 6 and preferably beneath the threading block 7. where it is provided with an opening 17 through which the stud or lug 9 of the threading block is positioned to thereby maintain the shelf or support in position when the threading block is secured in the thread block receiving chamber 6.

As indicated in Figs. 2 and 4, it will be noted that the portion of the shelf or support-16 which extends into the bobbin chamber has a rounded contour at 18 directly in front of the filling carrier or bobbin, the construction being such that while such shelf or support 16 thus affords a good practical form of means of preventing deflection of the spring tensioning members downwardly, it in no way interferes with the replenishing operation.

The threading block 7, as indicated more clearly in Fig. 4., has the longitudinally extending thread passage 19 which may-be of usual form, and rearwardly thereof the spring tensioning members over the bridge 21 and through the thread passage to the side delivery eye 22.

r In Figs wherein. each of the tensioning, members 5'and 6 a slightly modified form of the spring tensioning members is shown,

unwinds'from the filling carrier it, will e directed between the ends of the comprises a plate23' having a frontwardly extending portion 24 at the side of the threading block 7, through which portions the threading block securing bolt 8 may be passed, in order to hold'the spring tension mg plates in operative position. In the construction shown by Figs; 5 and 6, the part 24.0flthe plate 23 is provided with an openthe tensioning plates into the shuttle by the block' securing bolt 8. The portion 23 of each of 'thespring tensioning plates is disposedin the bobbinjchamber and reversely bent at 26 to form the spring end portions 27 which converge at the point 28 where the ends-meet to provide a tension passageway for the filling as it is drawn from the filling carrier or bobbin. .In the modified construe-- tion, as in the preferred form of the invention, it willbe noted that the spring tensioning members are not only located in the bobbin chamber but enclose the end portion of the fillin carrier or bobbin 4, and their meeting en s rest upon the support 16.be-.

- neath.

" tions or lugs 20 above the rest or support 16' are .located one at each side ofthe spring As indicated in 2 and 5, the projectensioning plates and serve as stops for'any excessive, separating movement of such plates whichmight tend to destroy their resiliency.

What is claimed is: 1. An automatically threading loom shuttlehaving .a bobbin chamber, two leaf chamber to' enclose the end portion of the bobbin and prevent ballooning and to provide tension on the thread as it'unwmds from the bobbin during weaving.

2. An automatically threading loom shuting 25 as a convenient means for securing.

of the bobbin.

tle having a bobbin chamber and threading block,- two leaf springs secured to the shuttle with their thread tensioning ends in-' closing the end of the'bobbin within the bobbin chamber rearward of. the threading block, and ashelf extending-into the bob:

bin chamber and supporting the tensioning ends of the springs frontward of the en-def,

the bobbin.

3. An automatically threadingloom shuttle havinga bobbin chamber and'threading block, two leaf springs secured to the shuttle with their thread tensioning ends inclosing the'end ofthe bobbinwithin' the bobbin chamber rearward of the tensioning block, means for adjusting the ends of the springs relatively towards and from each bin chamber and supporting the'tensioning ends of the springs frontward of the. end

14. An automatically threading loom shuttle having an. open 'bobbinchamber, a threading block frontward of the bobbin chamber, two leaf springs secured tothe shuttle and extending longitudinally in the bobbin chamber, the ends of said springs converging frontwardly and. inclosing the end,of the bobbin rearward 'of the thread mg block, and a shelf extending rearwardly' from the end of the shuttle into the bobbin Cal other, and a shelf extending into the bob-' chamber for supporting the ends of. the

sprinf... p 5. n automatically threading loom shuttle having an open bobbin chamber, a

threading block frontward of the bobbin I chamber, two leaf springs secured w the shuttle. and extending longitudinally in the.

" bobbin chamber, the ends of said springs springs extending longitudinally of theshuttle .and converging within the bobbin- *c'onyerging frontwardly and Iinclosing end of the bobbin rearward ofthe threading" of the converging lea block,'a shelfextending rearwardly from the end of the shuttleinto-the bobbin chamber the springs.

6. .Anautomatically threading loom shuttle-*having a bobbin chamber, two leaf.

springs extending longitudinally of the shuttle within the bobbin chamber'and converging about the end of the bobbin in the bobbin chamber to prevent excessive ballooning of the thread and provide tension thereon during, weavin the upper edges I springs being in clined: frontwardly and transversely 0f the bobbin chamber adjacent the delivery end of the bobbin.

In testimony whereof, I have signed my 7 name to this specification.

WILLIAM R. THIGPEN.

'for supporting the ends of the springs, and .105

orad usting the tensioning efiect 0f- 

